Land & Engineering
Level Surveys & Site Gradients
Accurate spot levels and the falls between them. On Kent's clay, the difference between a fall you designed and a fall you measured is the difference between a drainage scheme that works and one that ponds every winter.
Typical accuracy · ±8mm vertical on control, typically ±10mm on spot levels over short baselines.
When you need it
- →You are designing a drainage or attenuation scheme and need real falls.
- →Subsidence or heave is suspected and you need a level baseline to prove movement.
- →Retaining walls, embankments or platform levels need verifying.
- →A previous survey is being disputed and the levels do not agree.
What you get
- Spot level schedule on a fixed grid
- Cross-falls and gradients at the point of interest
- Benchmark and control documentation
- Profiles along specified lines
- Comparison against design levels where you supply them
How it runs
- 01
Confirm the benchmark and the levels you are measuring against.
- 02
Survey a close-spaced level grid appropriate to the ground conditions.
- 03
Close the levelling run and prove it before leaving site.
- 04
Issue the schedule with a clear note of the datum used.
- Horizontal control
- ±10mm typical
- Vertical control
- ±8mm typical
- Datum
- OSGB36 · EPSG:27700
- Area covered
- Norfolk base · 6 regions
Questions we get asked
Why is Kent clay specifically a problem?
Shrink-swell clay moves seasonally. A slope that is adequate in summer can hold water in winter. That is why a level survey of the actual ground is worth more here than a desktop assumption.
Where we cover
Norfolk based, working nationwide. Site-based surveying, so distance is rarely the constraint.
Most requested in Norfolk, Kent & Medway, Suffolk, Cambridgeshire & Essex, Lincolnshire & the Midlands.
Every town, district and borough we cover is listed in full on each region page. See the full service area.
All 18 other services
Start here
Send the address and what it is for.
You will get a straight answer on whether this survey is the right one, and what it should cost. If it is not, we will say so.
info@prospaplans.com · Norfolk, Kent, London, East Anglia and the Midlands